JPH1157585A - Constant liquid feeder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a constant liquid feeder without needing a large equipment cost. SOLUTION: This constant liquid feeder is provided with two freely rotatable pulleys 1, 2 arranged on a fixed part at a certain interval, a cable putted on the pulleys 1, 2, a material tank 4 attached to one end of the cable 3, housing a low viscosity liquid 5 and for discharging the liquid 5 from the bottom, a weight 7 attached to another end part of the cable 3 and heaving than the material tank 4 housing the liquid 5, a gear 8 attached to one of the pulley 1 in the same axial center and a projecting part 9a attached tiltably to the fixed part and engaged with the gear 8 and is constituted of a rod-like stopper 9 having a supporting point 9b at the gear 8 side, a float rod 10 almost vertically attached to the end part of the stopper 9 at the opposite side of the gear 8, a float 11 attached to the tip of the float rod 10 and for detecting the height of the liquid level and the like. Then, since the liquid can supplied quantitatively without using electricity or the like, the equipment cost is drastically reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid metering device for continuously supplying a constant amount of varnish to the tip of a brush during the operation of coating a varnish on a printed circuit board with a brush.

[0002]

2. Description of the Related Art Conventionally, as a device for continuously supplying a fixed amount of liquid, there are a pump driven by a motor or the like, and a device using compressed air.

[0003]

However, since the conventional liquid metering device uses a motor and compressed air, it requires electricity and a compressor, and further requires a control device to control the discharge amount. there were. Therefore, there has been a problem that a large equipment cost is required. Therefore, an object of the present invention is to provide a liquid fixed-rate supply device that does not require a large facility cost.

[0004]

In order to solve the above-mentioned problems, a liquid metering device according to the present invention comprises two rotatable pulleys spaced from each other at a fixed portion, and a cable hung on the pulley. A material tank attached to one end of the cable, into which a low-viscosity liquid is put, and the liquid is discharged from below, and a weight heavier than the material tank containing the liquid attached to the other end of the cable. ,
A gear attached to the one pulley and having the same axis, a rod-shaped stopper attached to the fixed portion so as to be tiltable, having a convex portion engaging with the gear, and having a fulcrum on the gear side; The stopper comprises a float rod which is attached substantially perpendicularly to the end on the side opposite to the gear, and a float which is attached to the tip of the float rod and detects the height of the liquid level.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a front view showing a liquid supply device of the present invention. In the drawing, 1 and 2 are two rotatable pulleys arranged at intervals on a fixed portion, 3 is a cable hung on the pulleys 1 and 2, and 4 is a material tank attached to one end of the cable 3. A low-viscosity liquid 5 such as a varnish is put into the inside, and the liquid 5 is discharged from a lower part through a material discharge tube 6. Reference numeral 7 denotes a weight attached to the other end of the cable 3, which is set to be heavier than the material tank 4 containing the liquid 5. Reference numeral 8 denotes a gear, which is mounted on one pulley 1 with the same axis. Reference numeral 9 denotes a rod-shaped stopper, which is provided with a fulcrum 9a on the gear side so as to be tiltably attached to a fixed portion, and has a projection 9b which engages with the gear 7. 10
Is a float rod attached substantially vertically to the end of the stopper 9 on the side opposite to the gear, and a float 11 for detecting the height of the liquid surface of the liquid is attached to the tip. Reference numeral 12 denotes a slide unit attached to the fixed portion, and the support portion 12a is attached to the outer surface of the material tank 4. In such a configuration, the supply of the liquid is performed as follows. First, a certain amount of the liquid 5 is put into the material tank 4. When the liquid 5 is put into the material tank 4, the float 11 floating on the liquid surface
Goes up. When the float 11 rises, the float rod 10 lifts the end of the stopper 9 on the material tank side, and engages the projection 9b provided on the end on the weight side with the gear 8. Thereby, the movement of the pulley 1 integrated with the gear is stopped, the weight 7 does not move up and down, and the liquid level is set at a constant height. In this state, the liquid 5 in the material tank 4 is supplied to, for example, a brush (not shown) through a material discharge tube 6 provided in a lower part of the material tank 4. When the liquid 5 in the material tank is supplied to the outside, the liquid level of the liquid 5 goes down, and the float 3 goes down accordingly. When the float 3 is lowered, the end of the stopper 9 on the side of the material tank 4 is lowered by the float rod 10, and the end on the weight side is raised on the contrary. As a result, the engagement between the projection 9b of the stopper 9 and the gear 8 is released, and the pulley 1 becomes rotatable, and the material tank 4
The heavier weight 7 lowers and raises the material tank 4 mounted on the other side of the cable. Material tank 4
The liquid level of the liquid 5 also rises with the rise, and the end of the stopper 9 on the material tank side is lifted up via the float and the float rod. In addition, since the material tank 4 is guided in the vertical direction by the slide unit 12, the support is stable both when stationary and when moving. When the end on the material tank side of the stopper 9 is lifted upward, the end on the weight side is conversely lowered, and the projection 9b of the stopper 9 and the gear 8 are engaged, and the rotation of the pulley 1 is stopped. Thereby, the liquid level of the liquid 5 returns to the original height. With the supply of liquid,
By repeating this movement, the liquid level is maintained at a constant height. By maintaining the liquid level at a constant level, the amount of liquid supplied from the material discharge tube 6 becomes constant.

[0006]

As described above, according to the present invention, it is possible to supply a fixed amount of liquid without using electricity or the like, so that the equipment cost can be greatly reduced and the force that does not fluctuate, such as gravity, is used. Therefore, there is an effect that the discharge amount is very stable.

[Brief description of the drawings]

FIG. 1 is a front view of a liquid metering device showing an embodiment of the present invention.

[Explanation of symbols]

 1 pulley, 2 pulley, 3 cable, 4 material tank, 5 liquid, 6 material discharge tube, 7 weight, 8 gear, 9 stopper, 9a fulcrum, 9b convex portion, 10 float bar, 11 float, 12 slide unit, 12a support Department

Claims (1)

[Claims] 1. A rotatable two pulleys spaced apart from each other at a fixed portion, a cable hung on the pulley, and a cable attached to one end of the cable. A material tank for discharging the liquid, a weight heavier than the material tank containing the liquid attached to the other end of the cable, a gear attached to the one pulley with the same axis, and a tiltable to a fixed portion And a rod-shaped stopper having a convex portion engaging with the gear, and having a fulcrum on the gear side;
A liquid metering and feeding device, comprising: a float bar attached substantially vertically to an end of the stopper on the side opposite to the gear, and a float attached to a tip of the float bar and detecting a height of a liquid level.